Double-tree



(No Model.)

B. OOLWELL.

DOUBLE TREE.

.850. Patented Sept. 22, 1885.

N. PEYEIIS. Phewumo m her. Wanhingiofl, D. c.

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' ATENT EDYVARD COLYVELL, OF MILWVAUKEE, VISGONSIN.

DOUBLE-TREE.

SPECIFICATION forming part of Letters Patent No. 326,850, dated September 22, 1885.

Application filed July 13, 1885.

To aZZ whom it may concern:

Be it known that I, EDWARD CoLwELL, of Milwaukee, in the county of Milwaukee and State of \Visconsin, have invented certain new and useful Improvements in Double-Trees, of which the following is a specification.

My invention relates to double-trees; and its object is to provide an improved device of this class which will be simple and durable in its construction, strong and eflicient in operation, and one which will give a slow or balky horse a purchase while starting.

In the drawings, Figure 1 is a perspective view of my invention. Fig. 2 is a bottom or inverted plan view of the same. Fig. 3 is a vertical longitudinal sectional view. Fig. 4 is a detail transverse section taken through the double-tree proper. Fig. 5 is a detail perspective view.

Corresponding parts in the figures are denoted by the same letters of reference.

Referring to the drawings, A designates the tongue of a wagon, which is provided with the double-tree B, pivoted transversely in relation thereto. The said double-tree is secured to the tongue by means of a right-angular plate, 0, one end of which, 0, is secured to the tongue A, and the other, 0 is formed with an eye, a, for the passage of a pivot pin or bolt, D, passing through an eye, I), in the double-tree. Plates E are secured to the double-tree at each side the tongue or pole on its rear and under sides, and the outer ends, 0, of said plates are bent at right angles to the main portion forming stop-flanges, as hereinafter described.

F F designate two U-shaped links, which are bent at their ends to form eyes f. These links or arms embrace the ends of the double-tree, and are adapted to slide over the surface of the plates E, and are prevented from slipping off at the ends by the flanges e of the plates E. Singletrees G G are connected with the loop portion of the links F F by means of staples g g, or in any other suitable manner.

H H designate two rcarwardly-convergent rods, which are provided at their outer ends with T-heads h h, having eyes ]L2 If. These T-heads are pivotally secured between the (Nomodel.)

eyes f of the links F F by means of pivot pins or bolts I I, passing through the eyes f and 71 The inner ends of the rods H H are bent to form eyes h h, which are connected to the tongue A by means of a plate, J, and pivot-pin K, corresponding to the plate 0.

The operation and advantages of my invention will be readily understood by those skilled in the art to which it appertains.

It will be observed that when the doubletree is moved 011 its pivot by the motion of the horses, the arms will easily slide over the surface of the plates E, secured to the sides of the double-tree, thus giving an easy motion to both the wagon and horses, and also facilitating a purchase to a slow or balky horse in starting.

The device also possesses the merits of simplicity and efficiency.

I claim as my invention, and desire to secure by Letters Patent- 1. As an improvement in doubletrees, the combination of the tongue or pole, the doubletree pivotally connected therewith, links adapted to slide upon the ends of the doubletree and carrying the single-trees, and the convergent rods pivotally connected with the sliding links, and pivoted at their rear ends to the tongue or pole, substantially as set forth.

2. As an improvement in double-trees, the combination of the tongue or pole, the double-tree pivotally connected to the tongue and provided with plates at each side thelatter, the links sliding upon said plates and carrying the single-trees, and the rods pivoted at their rear ends to the tongue and having T- heads pivotally secured between the rear ends of the links, substantially as and for the purpose set forth.

3. As an improvement in double-trees, the combination of the tongue or pole, a double tree pivoted thereto and provided upon its under and rear sides with plates having end flanges, U-shaped sliding links carrying the single-trees and embracing the ends of the doubletrec, rearwardly-convergent rods pivoted to the tongue and having T-heads provided with longitudinal eyes, and pivot-pins passed through eyes in the rear ends of the In testimony whereof I affix my signature in presence of two witnesses.

EDWARD COLWELL.

Witnesses:

CHRISTIAN MAYER, E. H. MARTIN. 

